If a planet has twice the mass of Earth, its radius would have to be larger by a factor of 2 for the gravitational field strength at the planet’s surface to be the same as on Earth’s surface. T or F

(1) Answers

False. Since the radius is cubed, you can get a much larger number, for example 2 cubed is 8 and 3 cubed is 27, and the radius does not have to be twice as big to double the cubed radius.

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